Recursively list Android image contents.

Relies on debugfs utility to inspect image contents.
The output looks something like this:
```
./
./app/
./app/Calendar/
./app/Calendar/Calendar.apk
```

Test: manual
Change-Id: Ia05f4e857dfd28ac76ac2b450b08f5cf5577d21f

scripts/Android.bp

@@ -188,3 +188,8 @@ python_binary_host {
         "get_clang_version.py",
     ],
 }
+
+sh_binary_host {
+    name: "list_image",
+    src: "list_image.sh",
+}